Boiler.



N o. 855,446. PATENTED JUNE 4, 1907. H. DEL MAR.

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ATTORNEY.

PATENI'ED JUNE 4, 1907. H. DEL MAR.

BOILER.

. APPLIOA-TIONIILED .J'AH. 2. 1907.

2 SHEETS-SHEET 2.

INVENTOR. w WM A TTORNEK I] ll llflllll -l] llll WITNESSES 2 Ti l I t soas to make this part of the boiler a return UNTTED STATES PATENTGEE-TEE.

HARRY DEL MAR, OF NEW YORK, N. Y., ASSIGNOR TO BOILER AND ENGI- NEERINGCOMPANY, OF JERSEY CITY, NEW

OF NEW JERSEY.

BOILER.

Patented June 4,1907.

No. 855,446. Specification of Letters Patent.

Application filed January 2, 1907. Serial No 350,501.

To Ml whom it may concern: reference indicate corresponding parts in allBe it known that 1,,HARRY DEL MAR, of the views.

the city, county, and State of New York, Figure 1 is a central verticalsection of a have invented a new and Improved F1rel boiler showingmyimprovements. Fig. 2 1S Tube and ater-Tube Boiler, of which the asectional plan on the line 2. 2 of Fig. 1, and following is a full,clear, and exact descrrp- Fig. 3 is a sectional plan on the line 3. 3of. tion. i Fi 1.

My invention relates to improvements in l The design of the boiler isnot very ma fire tube and water tube boilers, and the obterial, and lhave ject of my invention is to produce a combinatrates the use of tionboiler possessing both the fire tube and l and water tubes,

water tube characteristics, which is exceedin many other ways withoutdeparting from ingly compact, has the principal fire tubes the principleof the invention, as will be submerged, has a series of water tubes andreadily seen from the description which folheaders surrounding the maindrum in such a lows.

shown a design which illusthe combination fire tubes but these can bearranged way as to utilize the he at from the products The boiler has amain water drum 10, which of combustion to the best advantage, andmerges at the top into a larger and partly surwhich in general is aquick and efiicient rounding drum 11, and obviously the relasteam makingboiler. By combining the tive height of these parts can be changed tofire tubes and water tubes in a boiler, the wasuit varyingcircumstances. The drum 11 ter tubes will give out before the drum canhas a depressed central portion 12, the botburst in the event ofcarelessness, or for any tom of which forms the top of the drum 10,other cause beyond the control of the man in 1 so that the fire tubes 13which extend longicharge of the boiler. A boiler of this type,tu'dinally through the drum 10 can be contoo, can be made to cover moreground space stantly submerged. Any number of these and less height thanthe ordinary vertical tubes 13 can be used, and they extend the boiler,and besides greater power can be put full length of the drum 10, asshown in Fig. 1. in a small space, and steam can be produced Return firetubes 14 are also arranged in the quicker and of a drier quality thanwith the ordinary vertical boiler. 1 top of the boiler to the circularflue 15, from Another object of my invention is to pro- 1 whichconnection vcan be made with the stack duce a boiler having the gases ofcombustion at any desired point and in any usual way. which pass throughthe first set of fire tubes 1 The boiler is provided with a suitablecasing returned in an opposite direction through the 16, the walls ofwhich merge into the outer set of fire tubes in the annular steam drum,wall of the flue 15. It will be seen that the hot gases will risethrough the tubes 13, be deflected by the top of the casing 16, and passdown the tubes 1 1. It will also be observed that this structure makes acomplete fire tube boiler, but I prefer to use the sur rounding watertubes and connections which will be described below.

Radiating from the lower part of the drum 10 butnot quite all around it,are tubes 17 and 18, which are staggered so that the tubes 18 will notbe in vertical alinement with the tubes 17, and these connect the drum10 with headers 19, which latter can be of any approved form eitherstraight or serpentine. I The reason for leaving a part of the drum lblank so far as the arrangement of tubes and fire tube element andprevent thewaste of heat which results from a direct course through thefire tube system. The water tube system has a set of baffle plates todirect the course of the gases, and besides the tubes can be staggeredso as to break up the gases and utilize the heat .to the best advanta e.

With these ends in view, and with the general object of producing aboiler which will make steam economically, my invention consists ofcertain features of construction and combinations of parts which will behereinafter described and claimed.

Reference is to be had to the accompanying drawing forming a part ofthis specificaheaders is concerned, is to afford firing space tlon, inwhich similar letters and figures of as shown clearly in Fig. 3. Theheaders 19 drum 11, and extend from the space-in the JERSEY, ACORPORATION- 2, so that ready access can be had to the waconnect bynipples with the mud drums 21, which as shown by dotted lines in Fig. 8,form preferably segments of a circle, and the I drums connect by tubes22 with the drum 10. 1 Above the lower headers and above the tubes 17and 18 are series of tubes 23 and 24 which I are also staggered, andwhich extend from the upper part of the drum 10 to the headers 25, andthese, which may be of any approved type, entirely surround the drum 10,being preferably in a circular group as shown in Fig. 2. The headers 25are, however, preferably just inside the headers 19, so that the tops ofthe latter can be easily reached, and I the headers 19 should have caps26 on the I top as shown in Fig. 1, and by removing the caps, and byhaving the headers oflset as i shown, one is enabled to reach downthrough the headers 19 to clean the nipples 20, or to do any workthereon. Opposite the several radiating water tubes, and in the outerwalls i of the headers, removable caps 27 can be arl ranged as shown onone of the headers in Fig. I

ter tubes.

From the foregoing description it will be seen that I provide a verysimple and highly eificient. boiler, which is a combination of firetubes and water tubes, that the hot gases of combustion will risethrough the tubes 13 and pass down and out through the tubes 14, while apart of the hot gases will also rise between the several water tubes,and so I provide a boiler having water tube and fire tube 1 features inavery compact form and in a manner to economize heat.

It will be obvious that the design can be changed materially withoutaffecting the invention.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patent 1. A boiler of the kind described, comprising amain drum having fire tubes extending longitudinally through it, waterheaders placed around the main drum, water tubes connecting the headerswith the main drum, and mud drums placed around the main drum andconnected with the main drum and with the water headers.

2. A boiler of the kind described, comprising a main body portion havingan enlarged steam drum, up take fire tubes leading through the boilerproper, down-take fire tubes leading through the steam drum, upper andlower water headers arranged around the boiler, mud drums below thewater headers, and connections between the boiler proper, the headers,and the mud drums.

3. The combination with the fire tube and water tube boiler, ofsuperposed series of water tube headers, arranged. around and formingthe sidewalls of the boiler, the said headers connecting by water tubeswith the boiler.

HARRY DEL MAR. Witnesses:

WARREN B. HUTcHINsoN FRANK L. STUBBS.

